Wigner time-frequency distribution of high-order harmonics

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We investigate the time-frequency characteristics of high-order harmonics generated in atomic gases by intense femtosecond laser pulses, using the Wigner distribution function. The dynamically induced chirp of high harmonics is calculated both quantum mechanically and semiclassically, and a good agreement between them is reached as long as the tunneling effect is properly taken into account. Using the time-frequency analysis, we demonstrate that the large harmonic blueshift observed experimentally is due mainly to the single-atom effect.
Publisher
AMERICAN PHYSICAL SOC
Issue Date
2001-06
Language
English
Article Type
Article
Keywords

SOFT X-RAYS; LASER FIELDS; GENERATION; PHASE; COHERENCE; PULSES; IONIZATION; EMISSION

Citation

PHYSICAL REVIEW A, v.63, no.6

ISSN
1050-2947
URI
http://hdl.handle.net/10203/13376
Appears in Collection
PH-Journal Papers(저널논문)
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